[Dwarf-Discuss] DWARF has initial condition values? if not where then?

David Anderson davea42@earthlink.net
Thu Dec 6 23:55:33 GMT 2012

On 12/06/2012 01:02 PM, Long, Dan T wrote:
> Are the variables? initial condition values stored in the DWARF files?
> For example (Ada language with gnat compiler):
> type  A_type is
>    record
>     B : Integer := 10;
>     C : Float   := 2.5;
>     D : Boolean := true;
>    End record;
> EE : Integer := 100;
> FF : Float   := 77.007;
> Where are the initial condition values: 10, 2.5, true, and 100 stored in DWARF files?  Or where in the compiled code are they?   I used  readelf ?w filename.o  >  filename.dwarf   then
> I looked at its DWARF file and I can see the definition of structure A along with B, C, D type definitions and EE type too but I cannot find 10, 2.5, true nor 100 values anywhere.
> I needs to extract the variable names, types and initial values for input into a mySQL database.

Typically (with -g compilation, not by default) the type information and 
variable information is

The initial values of data items (variables) are in the executable itself,
usually in some data section.   DW_AT_location attributes in the DWARF  
records describing
variables provide the means for you write code (or use a debugger) to 
access any visible data values.

Hope this helps.

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